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clean up caching

This commit is contained in:
Dustin Brody 2019-03-27 16:38:34 -07:00 committed by zah
parent d84aa45a22
commit e1ba820486
1 changed files with 10 additions and 24 deletions
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34
beacon_chain/state_transition.nim
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@ -555,18 +555,9 @@ func get_attesting_balance(state: BeaconState,
func get_attesting_balance_cached(
state: BeaconState,
attestations: seq[PendingAttestation],
cache: var auto,
crosslink_committees_cache: var auto): Gwei =
return get_total_balance(state, get_attesting_indices_cached(state, attestations, crosslink_committees_cache))
#hash_tree_root's overhead's too big; could do custom hashing
#when false:
# let key = hash_tree_root(attestations)
# # caches only held within epoch processing stage, or shorter; ignore state
# if key in cache:
# return cache[key]
#
# result = get_total_balance(state, get_attesting_indices_cached(state, attestations, crosslink_committees_cache))
# cache[key] = result
get_total_balance(state, get_attesting_indices_cached(
state, attestations, crosslink_committees_cache))
func get_current_epoch_boundary_attestations(state: BeaconState):
seq[PendingAttestation] =
@ -596,7 +587,8 @@ func lowerThan(candidate, current: Eth2Digest): bool =
if v > candidate.data[i]: return true
false
func get_winning_root_and_participants(state: BeaconState, shard: Shard, cache: var auto, crosslink_committees_cache: var auto):
func get_winning_root_and_participants(
state: BeaconState, shard: Shard, crosslink_committees_cache: var auto):
tuple[a: Eth2Digest, b: seq[ValidatorIndex]] =
let
all_attestations =
@ -629,8 +621,8 @@ func get_winning_root_and_participants(state: BeaconState, shard: Shard, cache:
winning_root_balance = 0'u64
for r in all_roots:
let root_balance =
get_attesting_balance_cached(state, attestations_for.getOrDefault(r), cache, crosslink_committees_cache)
let root_balance = get_attesting_balance_cached(
state, attestations_for.getOrDefault(r), crosslink_committees_cache)
if (root_balance > winning_root_balance or
(root_balance == winning_root_balance and
lowerThan(winning_root, r))):
@ -742,8 +734,6 @@ func process_crosslinks(
previous_epoch = current_epoch - 1
next_epoch = current_epoch + 1
var
attester_balance_cache = initTable[Eth2Digest, uint64]()
## TODO is it actually correct to be setting state.latest_crosslinks[shard]
## to something pre-GENESIS_EPOCH, ever? I guess the intent is if there are
## a quorum of participants for get_epoch_start_slot(previous_epoch), when
@ -757,9 +747,8 @@ func process_crosslinks(
state, slot, false, crosslink_committee_cache):
let
(crosslink_committee, shard) = cas
(winning_root, participants) =
get_winning_root_and_participants(
state, shard, attester_balance_cache, crosslink_committee_cache)
(winning_root, participants) = get_winning_root_and_participants(
state, shard, crosslink_committee_cache)
participating_balance = get_total_balance(state, participants)
total_balance = get_total_balance(state, crosslink_committee)
@ -948,8 +937,6 @@ func get_crosslink_deltas(state: BeaconState, crosslink_committees_cache: var au
repeat(0'u64, len(state.validator_registry)),
repeat(0'u64, len(state.validator_registry))
)
var
attester_balance_cache = initTable[Eth2Digest, uint64]()
let
previous_epoch_start_slot =
get_epoch_start_slot(get_previous_epoch(state))
@ -960,9 +947,8 @@ func get_crosslink_deltas(state: BeaconState, crosslink_committees_cache: var au
for cas in get_crosslink_committees_at_slot_cached(state, slot, false, crosslink_committees_cache):
let
(crosslink_committee, shard) = cas
(winning_root, participants) =
get_winning_root_and_participants(
state, shard, attester_balance_cache, crosslink_committees_cache)
(winning_root, participants) = get_winning_root_and_participants(
state, shard, crosslink_committees_cache)
participating_balance = get_total_balance(state, participants)
total_balance = get_total_balance(state, crosslink_committee)
# In principle quadratic, but should be small.